If you look in the Library under 'Systemdek', there are a couple of suggested options in the comments added to the Profile and Profile II pages. I'm not sure which one you have from the description, but the headshell fittings were quite different IIRC.

This means, of course, that the widely available headshells with this fitting won't work. The required format might be available to special order from Japan as suggested in the posting on the relevant Library page.

There was a Profile arm with the S-shape, which uses the standard SME-mount headshells. I have one. Technics, Jelco (made the arm), etc. are good. Use lighter headshells like the Technics for higher-compliance cartridges, the heavier Sumiko/Jelcos for lower-compliance cartridges.

Ok, a question from a "newbie". I'm not even sure who I'm talking to but here goes... I have a Technics SL-1300 that was given to me by a friend. It all works well,however, there is nothing at the end of the tone bar except for a collar lock of some sort. I am right at 50 years old and have a lot of old vinyl that is in great shape and I would love to hear an actual "album" playing again!From what I've seen/read the next piece is called a "headshell" and that holds the needle cartridge,I think. Is that correct,and if it is where/how would I go about finding one? The tone arm is an"S-shape" desing if I am not mistaken.\ Thank you one and all for your help and considerations in my situation. Appreciatively, papajwert

Yes the headshell is the missing part, and there are plenty of standard models to fit into this arm. The simplest thing would be to buy the standard Technics headshell, which is readily available (http://www.needledoctor.com/Technics-Headshell, for example). You might find it cheaper elsewhere - on Amazon, for a start.

You would also need a cartridge, which bolts into the headshell and carries the stylus/needle that actually tracks the groove. There are a few packages of headshell and stylus, including special integrated one-piece models that just plug into the end of the arm, but most of these are for DJ/scratching service, not hi fi.

So, instead, how about fitting an Audio Technica AT95E (http://www.amazon.com/Audio-Technica-At95e-Mm-Cartridge/dp/B001MRXY94)? This would bolt easily into the headshell, then you just need to connect the wires to the back of the cartridge, and position it in the headshell (see alignment guides on this site). The arm is calibrated, so you just need to balance it, set the tracking force and anti-skate, and you'll soon be listening to your LPs again